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# Typical Speeds

### Typical Speeds

When you use the speed formula you find the average speed. It's good to know the "typical speeds" of different modes of transport.

*True or false: when you calculate* $speed = \frac{distance}{time}$ *for a journey, you always find the* * average* **

**speed***for that journey*

This athlete is running some of the way and cycling some of the way to cover $3,000 \space m$. What is her average speed in $m/s$?

**Typical** speeds

When we talk about the typical speed of say, a person running or a car driving...

this will always be an **average speed.**

An average person walks $45m$ in $30s$ . What is an average person's typical walking speed in $m/s$ ?

So, the typical speed of human walking is...

$1.5\:m/s$

An average cyclist travels $360m$ in an hour. What is the typical speed of a cyclist, in $m/s$?

So the typical speed of a cyclist is...

$6\:m/s$.

How fast do you think a **train** typically goes in $m/s$?

So the typical speed of a train is...

$55\:m/s$

A car journey from London to Manchester takes $3h$ on average. The distance is $270km$ . If $270km=270,000m$ and $3h=10,800s$ , what is the typical speed of a car in $m/s$?

Finally, what would you say is the typical speed of a person **running** in $m/s$?

So these are a few typical speeds

Walking, running, cycling, driving in a car and driving in a train.

Max gets a train that travels at $55m/s$ and the journey takes $2h$. How long is the journey in kilometres?

Steph needs to buy some milk before the shop near her house closes at **6pm**. The shop is $360m$ away.

What is the latest time she can leave her house in order to get to the shop a minute before it closes, if she runs at $3m/s$?

Not all people walk at the same speed

Which of the following can affect the speed at which a person walks?

You can select multiple answers

There are many factors which can affect the speed with which a person walks.

These include **age**, **terrain**, **fitness** and **distance travelled**.

Summary!

An object which is moving will rarely be moving at the same speed, constantly.

An object will usually be speeding up (accelerating) or slowing down. Therefore we use **average speed** to calculate the speed.

Different modes of transport have different typical speeds

This shows the typical speeds for walking, running, cycling, driving in a car and travelling in a train.

There are many factors which can affect the speed with which a person walks.

These include **age**, **terrain**, **fitness** and **distance travelled**.